高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (10): 1707.

• 研究论文 • 上一篇    下一篇

新的溶胶-凝胶法制备Ge/SiO2量子点玻璃

杨合情1,4, 刘守信1, 张邦劳1, 王喧2, 张良莹3, 姚熹3   

  1. 1. 陕西师范大学化学系;
    2. 陕西师范大学物理系, 西安 710062;
    3. 西安交通大学电子材料与器件研究所, 西安 710049;
    4. 复旦大学应用表面物理国家重点实验室, 上海 200433
  • 收稿日期:2000-07-13 出版日期:2001-10-24 发布日期:2001-10-24
  • 通讯作者: 杨合情(1963年出生),男,博士,副教授,从事纳米材料的制备及其物理性质的研究.

Preparation of Quantum-dot Ge Doped SiO2 Glass by a New Sol-gel Process

YANG He-Qing1,4, LIU Shou-Xin1, ZHANG Bang-Lao1, WANG Xuan ZHANG Liang-Ying2, YAO Xi3   

  1. 1. Department of Chemistry;
    2. Department of Physics, Shanxi Normal University, Xi'an 710062, China;
    3. Electronic Materialsand Research Laboratory, Xi'an Jiaotong University, Xi'an 710049, China;
    4. State Key Laboratory for Applied Surface Physics, Fudan University, Shanghai 200433, China
  • Received:2000-07-13 Online:2001-10-24 Published:2001-10-24

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摘要： 以3-三氯锗丙酸和正硅酸乙酯为原料,通过水解、缩聚凝胶热处理及氢气反应,在SiO2凝胶玻璃中析出立方相Ge纳米晶,当x=30时,凝胶玻璃中除了析出立方相Ge纳米晶外,还析出六方相GeO2.利用XRD测试了Ge纳米晶的大小,发现随着掺杂量的增加,纳米颗粒粒径从1nm增大到10nm.电子衍射表明镶嵌在SiO2凝胶玻璃中的Ge纳米晶为多晶结构.

关键词: 溶胶凝胶法, Ge纳米晶, SiO2玻璃

Abstract: Ge nanocrystals embedded in SiO2 gel-glasses were prepared by a sol-gel method. The gels synthesized through the hydrolysis of a complex solution of Si(OC2H5)4 and Cl3GeCH2CH2COOHwere heated at 600 ℃ in air, and then heated from 500 to 700 ℃ in H2, in which Ge4+ ions were reduced to precipitate Ge cubic crystals. However,Ge cubic as well as GeO2 hexagonal crystals were formed in SiO2 matrix when n(GeO2)/n(SiO2)=0.30. The size of Ge nanocrystals, determined from the line broadening of X-ray diffraction pattern, increases from 1 to 10 nm in diameter with molar ratios of GeO2/SiO2 increasing. The Ge nanocrystals were found to be polycrystalline in the SiO2 gel-glasses by electron diffraction pattern.

Key words: Solgel process, Ge nanocrystals, SiO2 glass

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